{"schema_version":1,"experiment_id":"eoa_inverse_innovation_exp09_archetype_breadth150_20260804","research_id":"eoa_inverse_innovation_exp09_light_prior_art_20260804","cell_id":"failover__chemistry_materials","search_lanes":{"direct_problem_and_intervention":{"queries":["continuous precipitation reactor fouling standby reactor switchover","continuous crystallizer fouling switch parallel crystallizers standby","continuous crystallization two identical reactors switch cleaning fouling original study"],"source_ids":["SRC1","SRC2","SRC4"],"no_result_note":null},"synonyms_and_historical_terms":{"queries":["standby reactor chemical process","continuous chemical process switch between reactors standby reactor","hot standby reactor continuous manufacturing process control"],"source_ids":["SRC2","SRC4"],"no_result_note":null},"products_practices_and_standards":{"queries":["ICH Q13 continuous manufacturing diversion material disturbances","FDA Q13 continuous manufacturing fouling material traceability diversion","continuous manufacturing redundant reactor process analytical technology"],"source_ids":["SRC2","SRC3"],"no_result_note":null},"component_combination":{"queries":["continuous crystallizer pressure sensor PAT fouling switch identical reactors","backup chemical reactor sensors waste receiver valves fouling","multi-segmented crystallizer fouled segment isolated clean segment online"],"source_ids":["SRC1","SRC2","SRC3","SRC4"],"no_result_note":null}},"sources":[{"source_id":"SRC1","title":"Strategies for managing clogging and encrustation in compact continuous crystallizers: Anti-solvent crystallization of paracetamol with fluidic oscillator and helical coil","publisher":"Chemical Engineering Science / Elsevier","url":"https://www.sciencedirect.com/science/article/pii/S0009250924014027","source_type":"PRIMARY_RESEARCH","claims_supported":["Clogging and encrustation narrow continuous-crystallizer channels, increase pressure drop, and eventually disrupt smooth operation.","The study detected clogging using pressure sensing and process-analytical tools.","Its prior-art discussion reports continuous operation achieved by switching between two identical reactors, although the study itself evaluates nonswitching mitigation strategies."]},{"source_id":"SRC2","title":"Scalable continuous production system (US 2003/0223909 A1)","publisher":"United States Patent and Trademark Office publication, accessed via Google Patents","url":"https://patents.google.com/patent/US20030223909A1/en","source_type":"OTHER","claims_supported":["A parallel chemical-production system reserves at least one reactor offline for cleaning, service, and backup, and places the backup online when sensors detect suboptimal operation.","Inline analytical sensors compare reactor output with predefined standards; controllers manipulate feed and collection valves to take a degraded reactor offline before it degrades collected product.","A serviced backup can receive reactants while its outlet remains connected to a waste receiver, and its output can be tested before joining accepted product.","The disclosure includes pressure-drop readiness testing, automated cleaning, replacement of defective reactors without downtime, and preservation of constant residence time when backup assignment changes."]},{"source_id":"SRC3","title":"Q13 Continuous Manufacturing of Drug Substances and Drug Products: Guidance for Industry","publisher":"U.S. Food and Drug Administration","url":"https://www.fda.gov/media/165775/download","source_type":"OFFICIAL_GUIDANCE","claims_supported":["Continuous-manufacturing control strategies should address state of control, process dynamics, real-time monitoring, disturbances, material traceability, and diversion.","Residence-time-distribution understanding supports determining when diversion begins and ends and tracing affected material.","Nonconforming material may be diverted under predefined criteria while processing continues, with automation controlling diversion boundaries and subsequent disposition.","The guidance identifies fouling monitoring, including pressure sensors, and recommends intentional perturbation studies and verification of controls."]},{"source_id":"SRC4","title":"A Novel Simulated Moving Plug Flow Crystallizer (SM-PFC) for Addressing the Encrustation Problem: Simulation-Based Studies on Cooling Crystallization","publisher":"Industrial & Engineering Chemistry Research / American Chemical Society","url":"https://pmc.ncbi.nlm.nih.gov/articles/PMC10064315/","source_type":"PRIMARY_RESEARCH","claims_supported":["Extended operation of continuous plug-flow crystallizers is limited by fouling and encrustation.","The proposed configuration isolates a fouled crystallizer segment while simultaneously bringing a clean segment online.","Simulation indicates that alternating segments could maintain uninterrupted crystallizer operation and product specifications under heavy fouling."]}],"problem_evidence":{"status":"SUPPORTED","finding":"The core problem is visible: continuous crystallization and precipitation equipment handling solids is prone to fouling, encrustation, clogging, pressure-drop increases, flow disruption, and product-quality effects. Public sources also support monitoring equipment and product state, tracing transient material, and diverting potentially nonconforming output. Evidence is strongest for compact and plug-flow crystallizers and microreactor arrays rather than the proposal's exact stirred materials-precursor reactor geometry.","source_ids":["SRC1","SRC2","SRC3","SRC4"]},"closest_prior_art":[{"name":"Scalable continuous production system with sensor-triggered backup microreactors","source_ids":["SRC2"],"overlap":"Discloses fouling-prone continuous chemical reactors, predefined sensor criteria, an offline cleaned backup, controller-operated isolation and collection valves, waste routing during qualification, output testing before acceptance, pressure-drop readiness checks, and replacement of a defective reactor while maintaining production.","remaining_difference":"It primarily concerns numbered-up parallel microreactors and does not expressly disclose transfer of one entire stirred precipitation path into a secondary synchronized for pH, liquid level, agitation, and seed-solids state, using the proposal's two-signal rule and controlled no-automatic-failback policy."},{"name":"Switching between two identical continuous crystallizers","source_ids":["SRC1"],"overlap":"The reviewed crystallization practice addresses fouling-driven interruption by switching between two identical reactors to preserve continuous operation, in the same solids-forming process neighborhood as the proposal.","remaining_difference":"The retained account does not establish the proposal's complete readiness record, multi-signal degradation rule, single-owner accepted-product interlock, explicitly labeled transition quarantine, or controlled reentry sequence."},{"name":"Simulated moving plug-flow crystallizer","source_ids":["SRC4"],"overlap":"Isolates a fouled crystallizer section and brings a clean section online to maintain uninterrupted crystallization and product specifications while enabling cleaning.","remaining_difference":"It is a segmented plug-flow configuration supported by simulation, not failover between two independently stirred and chemically synchronized precipitation reactors after detected degradation."},{"name":"ICH Q13 disturbance management and material diversion","source_ids":["SRC3"],"overlap":"Establishes adjacent practice for predefined disturbance criteria, PAT monitoring, RTD-based traceability, automated diversion of nonconforming transient material, fouling monitoring, and restart of accepted collection.","remaining_difference":"It is general continuous-manufacturing guidance and does not prescribe redundant precipitation reactors or transfer of reactor authority."}],"prior_art_disposition":"SUBSTANTIAL_COLLISION","contrastive_claim_remaining":"The remaining falsifiable distinction is narrow: for a single-path stirred precipitation process, synchronizing a separately isolatable secondary across temperature, pH, liquid level, agitation, and seed-solids state, then coupling a persistent two-signal primary-health rule to break-before-make transfer of the complete feed and accepted-product path, should shorten the out-of-window transition relative to stop-clean-restart while preserving single-reactor ownership, mass balance, and traceable quarantine. Reactor backup, sensor-triggered isolation, waste diversion, cleaning, and crystallizer switching are already disclosed separately and in substantial combination.","contrastive_claim_falsifier":"The distinction is falsified by a preexisting disclosure or documented operating practice that combines fouling-responsive multi-signal detection, chemically and hydrodynamically preconditioned standby precipitation, exclusive feed/product-header ownership, transition-material quarantine, and controlled reentry. Operationally, it is also falsified if the bounded comparison shows no shorter or cleaner transition than stop-and-restart, or if matched listed variables fail to reproduce the operative particle-forming state.","gates":{"adequate_source_search":{"status":"PASS","rationale":"The bounded search covered direct phrasing, synonyms and older standby terminology, continuous-manufacturing guidance, crystallizer practices, patents, and combinations of sensing, cleaning, diversion, and switching. Exactly four opened sources from four publishing channels were retained, including primary research and official guidance.","source_ids":["SRC1","SRC2","SRC3","SRC4"]},"supported_problem":{"status":"PASS","rationale":"Multiple sources directly document fouling or encrustation, pressure or flow disruption, limited continuous operation, and risks to output quality, while official guidance confirms the importance of detecting disturbances and diverting affected material.","source_ids":["SRC1","SRC3","SRC4"]},"distinct_testable_claim":{"status":"PASS","rationale":"Although broad failover substantially collides with prior art, the precipitation-specific synchronization bundle and its claimed reduction in transition duration remain measurable against stop-clean-restart using declared process-state, product-proxy, ownership, mass-balance, and quarantine outcomes.","source_ids":["SRC1","SRC2","SRC3","SRC4"]},"bounded_next_test":{"status":"PASS","rationale":"The six-trial aqueous-surrogate study is limited in scale, duration, chemistry, and decision scope. Intentional perturbation, pressure and PAT monitoring, RTD-aware quarantine, mass balance, and comparison with restart are aligned with methods and controls visible in the retained literature and guidance.","source_ids":["SRC1","SRC3","SRC4"]},"no_obvious_safety_or_authority_stop":{"status":"PASS","rationale":"No obvious categorical stop applies to a supervisor-authorized bench study using an approved nonproduction aqueous surrogate. The exclusions, conservative limits, interlocks, break-before-make ownership, quarantine, and halt conditions appropriately bound the first test; any hazardous chemistry or production-scale use would require separate process-safety and quality authorization.","source_ids":["SRC3"]}},"screen_survival":false,"world_novelty_boundary":"This light public-web screen found substantial collision with sensor-triggered backup chemical reactors, alternating crystallizers, segment isolation, and controlled diversion. It does not establish whether the narrowed synchronization bundle is novel anywhere in the world, patentable, commercially valuable, accepted by experts, or successful in operation; those questions require broader patent, technical, operational, and jurisdiction-specific review."}